Ore-crusher



(No Model.) 2 Sheets-Sheet 1.

H. GREGORY, J1.

ORB GRUSHER.

Patented Apr. 21, 1896.

ANDREW BJSRANAM. PHDTOil'mQWASHI-NGTONRQ (No Model.) v 2 Sheets-Sheet 2.

H. GREGORY, Jr.

ORE ORUSHBR Patented Apr. 21, 1896.

llnrrn TATES ORE-CRUSHER.

SPECIFICATION forming part of Letters Patent No. 558,803, dated April 21, 1896.

Application filed August 8, 1896.

T0 aZZ whom it may concern.-

Be it known that I, HANSON GREGORY, J r., of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Ore-Crushers, of which the following is a specification.

This invention relates to that class of orecrushing machines in which a series of rolls located on shafts radiating from a vertical driving-shaft are caused by the rotation of said shaft to travel around in an annular bed or trough which receives the ore to be crushed.

The invention has for its object to provide certain improvements in the form of the rolls and bed and in the means for connecting the rolls with the driving-shaft, whereby the rolls are enabled to act on the ore with a pressure due to centrifugal force as well as to their own weight.

The invention consists in the improvements which I will now proceed to describe and claim.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a top view of an ore-crushing machine embodying myimprovement-s. Fig. 2 represents a section on line 2 2 of Fig. 1. Fig. 3 represents a top plan View of the carriage or carrier hereinafter referred to engaged with the drivingshaft, portions of the carrier being broken away and the shaft being shown in section. Figs. 4c, 5, and 6 represent detail views hereinafter referred to.

The same letters and numerals of reference indicate the same parts in all the figures.

In the drawings, a represents a vertical driving-shaft, which receives motion from a suitable source of power, through mechanism such as that shown in Fig. 2.

12 represents a hub, which is affixed to the upper end of the shaft a and is provided with radiating guides or ways I), which have vertical flanges b b at their edges, said flanges bearing upon the sides of the boxes 0 0 (hereinafter referred to) and causing said boxes to revolve about the shaft. The hub b and arms Z1 constitute what I call a carrier, which is rotated by the shaft a and is engaged therewith by means of keys at on said shaft.

Each arm I) contains two boxes 0 c, and said boxes are connected by a base-plate or web 0, each pair of boxes and their connecting-web constituting a holder or support for a shaft (Z Serial No. 568,618. (No model.)

upon which a crushing-roll c is mounted to rotate, there being as many shafts d and rolls as there are arms 1), three being the number shown in the present case. Each of said holders is hinged or jointed to the hub 22 by means of hinge members formed,respectively, on the hub and on the inner box c,and a pivot f, connecting said hinge members, the arrangement being such that the boxes 0 c and the shafts (Z journaled therein can oscillate in vertical planes to permit the rolls e e to rise and fall.

g represents an annular bed which supports the rolls 6. Said rolls are provided with cylindrical faces 2 and tapering or conical faces 3, said faces 3 comprising the outer portions of the rolls. The bed g is provided with a horizontal portion 4, corresponding to the cylindrical portions 2 of the rolls, and with an inclined portion 5, corresponding to the conical portions 3 of the rolls, so that the rolls conform closely to the bed, asshown clearly in Fig. 2. The rolls 6 are aifixed to the shafts cl, andthe latter are journaled to rotate in the boxes 0 c, and are also free to move longitudinally in said boxes, so that when the shaft a is rapidlyrotated the rolls will be pressed outwardly against the inclined surface 5 of the bed 9 by centrifugal force. Hence in crushing the ore I utilize not only the weight of the rolls, but also the above-described centrifugal action.

I prefer to provide springs h, arranged to normally move the shafts d and the rolls 6 inwardly to separate the conical portions 3 of the rolls from the inclined portion 5 of the bed when the machine is not in operation,'or when the centrifugal force is sufliciently reduced to permit said springs to act in the mannor described. As here shown, the springs h are of helical form and are interposed between the outer boxes 0 and collars (1, aflixed to the shafts (Z.

g and 9 represent annular curbs located, respectively, at the inner and outer edges of the bed g, and cooperating with the latter in forming an annular trough or tank which confines a suitable depth of water above the bed.

I claim- 1. An ore-crushing machine comprising a circular bed, a driving-shaft surrounded by said. bed, boxes or supports connected with said shaft and revolved thereby, shafts journaled in said boxes and movable longitudinally therein, crushing-rolls mounted on said shafts, said rolls and shafts being movable outwardly by centrifugal force, and springs arranged to press said rolls and shafts inwardly.

2. An ore-crushing machine comprising a circular bed having a substantially horizontal working surface a and an inclined working surface 5, a series of rolls each having a eylindrieal peripheral portion 2 anda conical peripheral portion 3, and means for moving said rolls upon the bed, said means having provision for the outward movement of the rolls by centrifugal force.

3. An ore-crushing machine comprising a circular bed, a driving-shaft surrounded by said bed, a carrier or driver secured to said HANSON GREGORY, JR.

lVitnesses:

A. D. HARRISON, W. P. ABELL. 

